Pregnancy Due Date Calculator
Frequently Asked Questions
How does the Due Date Calculator work?
The Due Date Calculator estimates your baby's expected arrival date based on your last menstrual period (LMP) or conception date.
How accurate is the estimated due date?
A due date estimate is generally accurate within 1-2 weeks, but only 5% of babies are born exactly on their estimated date.
Can an ultrasound change my due date?
Yes, an ultrasound scan can provide a more accurate due date based on the baby’s growth and development.
How do doctors calculate my due date?
Doctors use Naegle’s Rule, which adds 280 days (40 weeks) to the first day of your last menstrual period (LMP).
Can my due date change later in pregnancy?
Yes, if the baby is growing at a different rate than expected, your OB-GYN may adjust your due date.
What if I don’t know my LMP?
If you're unsure of your LMP, an early ultrasound scan can help determine your estimated due date.
Can stress or diet affect my due date?
No, your due date is based on gestational age, but factors like stress, diet, or genetics can impact when labor starts.
How can I prepare for my due date?
Track your prenatal milestones, maintain a healthy pregnancy diet, and create a birth plan with your doctor.
Can I have a planned delivery before my due date?
Yes, some women schedule induced labor or C-sections before their due date, but it's best to wait until at least 39 weeks for full development.
How do I know if I’m going into labor early?
Signs of preterm labor include regular contractions, water breaking, and lower back pain before 37 weeks—contact your doctor immediately.